I use home-made header tanks - round bottle 4-6oz - with the pickup/filter located rigidly in the geometric center - very similar in theory to what Erbroens described. I don't need to get rid of every last air bubble, if there is a very small air bubble in the tank, it runs around the outside of the bottle during roll-type manoeuvres. Most Jets should be flown on a scale manner - but if you are into +ve/-ve snap-type flying they usually take place at the beginning - or midway through the flight - not at the end when the fuel is low - if so then perhaps a UAT is better.
Leon